基于TiO2-Au双层膜结构的D型光子晶体纤维低折射率传感器设计与分析
Design of a D-Shaped Photonic Crystal Fiber Low Refractive Index Sensor with a TiO2-Au Bilayer Structure
DOI: 10.12677/oe.2026.161002, PDF,   
作者: 刘震震：天津工业大学物理科学与技术学院，天津
关键词: 光子晶体光纤；表面等离子体共振；低折射率；Photonic Crystal Fiber； Surface Plasmon Resonance； Low Refractive Index
摘要: 基于表面等离子体共振原理，设计了一种U型凹槽的D型光子晶体光纤传感器。对于传统传感器而言，单一金属作为传感层存在灵敏度较低的问题，研究设计了在凹槽结构上涂覆二氧化钛和金双层膜，用来提升传感器的稳定性和灵敏性。基于仿真结果表明，该传感器在待测物RI为1.22~1.29之间，最高的波长灵敏度达到14,000 nm/RIU，最佳分辨率为5.52 × 10−6 RIU。在低RI检测领域具有一定竞争力。
Abstract: Based on the surface plasmon resonance (SPR) effect, a D-shaped photonic crystal fiber (PCF) sensor featuring a U-shaped groove is presented. To mitigate the low-sensitivity issues inherent in traditional single-metal-layer sensors, a TiO2-Au bilayer structure is incorporated into the groove to optimize sensing stability and sensitivity. Numerical analysis reveals that the sensor yields a peak wavelength sensitivity of 14,000 nm/RIU and a minimum resolution of 5.52 × 10−6 RIU over an analyte refractive index (RI) range of 1.22~1.29. These results highlight the sensor’s superior performance and competitiveness for low-RI detection applications.
文章引用：刘震震. 基于TiO2-Au双层膜结构的D型光子晶体纤维低折射率传感器设计与分析[J]. 光电子, 2026, 16(1): 9-18. https://doi.org/10.12677/oe.2026.161002

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